/* ============================================================
   useful-index.css
   /useful/ お役立ち情報トップ（親ページ）専用の上書き。
   共通レイアウトは guide-common.css を先に読み込む。
   ============================================================ */

.useful-index-guide .guide-intro__definition {
  margin: 0;
}

/* --- 子ページカード（3件を同じ優先度で並べる） --- */
.useful-index-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.useful-index-card {
  display: flex;
  height: 100%;
  flex-direction: column;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--guide-border);
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(45, 52, 54, 0.05);
  color: var(--guide-ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.useful-index-card:hover,
.useful-index-card:focus-visible {
  border-color: var(--guide-gold);
  box-shadow: 0 10px 24px rgba(45, 52, 54, 0.1);
  transform: translateY(-2px);
}

.useful-index-card__thumb {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--guide-soft);
}

.useful-index-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.useful-index-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 8px;
  padding: 20px 20px 22px;
}

.useful-index-card__title {
  font-size: 1.14rem;
  font-weight: 800;
  line-height: 1.5;
}

.useful-index-card__text {
  color: var(--guide-muted);
  font-size: 0.94rem;
  line-height: 1.8;
}

.useful-index-card__cue {
  margin-top: auto;
  padding-top: 6px;
  color: var(--guide-red);
  font-weight: 700;
}

.useful-index-card__cue::after {
  content: "\0020\203A";
}

/* --- 目的から探す（関連ページ） --- */
.useful-index-group + .useful-index-group {
  margin-top: 26px;
}

.useful-index-group__label {
  margin: 0 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--guide-gold);
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.5;
}

.useful-index-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.useful-index-links a {
  display: flex;
  height: 100%;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--guide-soft);
  border: 1px solid var(--guide-border);
  border-radius: 12px;
  color: var(--guide-ink);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.useful-index-links a:hover,
.useful-index-links a:focus-visible {
  background: #fff;
  border-color: var(--guide-gold);
}

.useful-index-links strong {
  font-size: 1rem;
  line-height: 1.6;
}

.useful-index-links span {
  color: var(--guide-muted);
  font-size: 0.9rem;
  line-height: 1.75;
}

@media (max-width: 959px) {
  .useful-index-cards,
  .useful-index-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 599px) {
  .useful-index-cards,
  .useful-index-links {
    grid-template-columns: 1fr;
  }

  .useful-index-card__body {
    padding: 18px 16px 20px;
  }
}